/*
  GRANITE DATA SERVICES
  Copyright (C) 2007-2008 ADEQUATE SYSTEMS SARL

  This file is part of Granite Data Services.

  Granite Data Services is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 3 of the License, or (at your
  option) any later version.

  Granite Data Services is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
  for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with this library; if not, see <http://www.gnu.org/licenses/>.
*/

package org.mendoza.salud.hvt.model;

import javax.annotation.PostConstruct;
import javax.persistence.*;
import java.util.UUID;


@MappedSuperclass
public abstract class AbstractEntity extends Versioned {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Integer id;

    /* "UUID" and "UID" are Oracle reserved keywords -> "ENTITY_UID" */
    @Column(name = "ENTITY_UID", unique = true, nullable = false, updatable = false, length = 36)
    private String uid;

    public AbstractEntity() {
        if (uid == null) generateUID();
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @Override
    public boolean equals(Object o) {
        return (o == this || (o instanceof AbstractEntity && getUid().equals(((AbstractEntity) o).getUid())));
    }

    @Override
    public int hashCode() {
        if (getUid() == null) generateUID();
        return getUid().hashCode();
    }

    public String getUid() {
        return uid;
    }

    public void setUid(String uid) {
        this.uid = uid;
    }

    @PostConstruct
    private void generateUID() {
        if (getUid() == null) {
            setUid(UUID.randomUUID().toString());
        }
    }
}
